Software Engineer II – Integrations & API Connectivity

Role overview

Responsibilities

• Develop, test, and support scalable APIs and backend services.
• Design and implement reliable, maintainable software solutions.
• Troubleshoot application and production issues with guidance from senior engineers.
• Participate in code reviews and follow engineering standards.
• Implement unit, integration, and end-to-end tests.
• Collaborate with Product, Architecture, Security, and SRE teams.
• Improve observability, automation, and operational efficiency across services.
• Apply new technologies, tools, and engineering practices.

Technology stack

• Backend technologies include C#, .NET, and Web APIs.
• Cloud technologies include Azure App Services, Key Vault, and Blob Storage, plus AWS S3, Redis, and microservices.
• Data technologies include PostgreSQL and Flyway.
• Engineering practices include CI/CD pipelines, observability, and secure development.
• Java, Spring Boot, and AI-assisted tools such as GitHub Copilot are additional technologies.

Required qualifications

• Candidates need 2–4 years of professional software engineering experience.
• Experience with backend applications and APIs using modern programming frameworks is required.
• Candidates need familiarity with cloud platforms and distributed-systems concepts.
• Understanding of SDLC, testing practices, and secure coding principles is required.
• The role requires technical problem-solving, collaborative delivery, communication, teamwork, and continuous learning.

Preferred qualifications

• Experience in payments, banking, or Open Banking environments is preferred.
• Exposure to microservices architectures is preferred.
• Monitoring, observability, and production support experience is preferred.
• Experience with AI-assisted development tools is preferred.

Corporate security responsibility

• Employees must follow Mastercard security policies and practices.
• Employees must protect the confidentiality and integrity of accessed information.
• Employees must report suspected information-security violations or breaches.
• Employees must complete periodic mandatory security training.